Osterias are wine bars that have evolved to serve simple meals. Traditionally, they are simpler than trattorias and usually have no menu. The offering changes daily, according to the market and two or three courses are offered for a fixed price, including wine.

In the past, a trattoria was a more casual dining location while a ristorante was elegant and formal. Currently, these words can be used interchangeably as trattorias have become a bit more formal. However, you can still walk into either and notice distinct differences.